Vapor lock when hot

88 volks cab will vapor lock up on days when temp gets over 85. Won't turn over till cooled off. She will start ok but once she is hot she will totally shut done like she is getting nothing, power or gas.

4 Answers

Sometimes a switch to an electric fuel pump will help with that problem. If you notice any place along the fuel line coming to close to the exhaust try adding a heat shield or insulating wrap to the line.

if you are having trouble with vapor lock, and your sure what it
is, only one solution. add an inline gauge and regulator, i did. it
keeps the flow down so it will not vapor lock. temp can be over
100F and it wont lock up on you, good luck. take my word on
this, been there done that. [i was riding thru AZ. and it was like
113F, brand new caddy was on side of road, we got it started
with pouring gas into carb, worked and he was on his way. i
never had a problem, had that inline fuel pressure regulator on
my ole car, worked like a charm.] This is why most FI wont have
that problem, chances are that more then one FI line will vapor
lock very slim. but a CARB. has only one fuel line. {FI=fuel
injectors} good luck. Howard

firebird338, if that was the problem, he would not have noticed
that it happens only when temp gets over 85F or so. it would
happen 100% of the time if what you said was true, and that
heat shield was indeed missing. also, that would be one of the
first things to check, again if it was happening all the time it
would make the car almost unusable, but from his question, this
is not the case and it does not happen when it does not reach
85F+. just saying.

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